Crane hook anti-falling device

Abstract

The utility model discloses an anti-dropping device for a crane hook, which belongs to the technical field of lifting devices and comprises a hook body, a lifting rod is rotatably connected onto the hook body and rotates on the hook body to open / block an opening of the hook body, a sliding groove is arranged inside the hook body, a sliding rod is slidably mounted inside the sliding groove, and the hook body is provided with a sliding groove. An inserting groove allowing the sliding rod to be inserted is formed in the hanging rod, a flexible air bag is installed on the inner arc face of the hook body, and an air guiding hole communicating an inner cavity of the flexible air bag with an inner cavity of the sliding groove is formed in the hook body; compared with a traditional spring piece structure, the anti-falling device for the crane hook has the advantages that the anti-falling reliability is improved, and the heavy object is effectively prevented from falling off accidentally in the hoisting process.

Description

Technical Field

[0001] This utility model specifically relates to a crane hook anti-detachment device, belonging to the technical field of lifting devices. Background Technology

[0002] In fields such as construction, port loading and unloading, and heavy equipment installation, cranes are important material handling equipment, and their hooks play a crucial role in lifting heavy objects. To prevent heavy objects from accidentally slipping off the hook during lifting and to ensure operational safety, hook anti-detachment devices are an indispensable safety component of cranes. Their function is to close the hook opening after the slings are attached to the hook, preventing the slings from slipping out of the hook opening.

[0003] Currently, most crane hook anti-derailment devices on the market use a simple spring plate structure, where the spring force keeps the spring plate covering the hook opening. However, this traditional anti-derailment device has many drawbacks: during long-term, high-frequency lifting operations, the spring is prone to fatigue, weakening its elasticity or even failing, resulting in the spring plate failing to reliably seal the hook opening; furthermore, in harsh working environments, such as high temperature, humidity, and dust, the spring plate is prone to rusting and jamming, affecting its normal opening and closing, thus reducing the safety and reliability of the anti-derailment device. Once the anti-derailment device fails, it is highly likely to cause a heavy object to fall, resulting in serious personal injury and property damage. Utility Model Content

[0004] The purpose of this utility model is to provide a crane hook anti-detachment device to address the shortcomings of the existing technology.

[0005] A crane hook anti-detachment device includes a hook body, a boom rotatably connected to the hook body, the boom rotating on the hook body to open / close the opening of the hook body, a sliding groove inside the hook body, a sliding rod slidably installed inside the sliding groove, a slot for inserting the sliding rod inside the boom, a flexible airbag installed on the inner arc surface of the hook body, and an air guide hole on the hook body connecting the inner cavity of the flexible airbag and the inner cavity of the sliding groove.

[0006] Furthermore, one end of the boom is fastened to the hook body, and the other end of the boom has a lifting hole.

[0007] Furthermore, a rotating groove is provided at one end of the hook body, and the lifting rod is rotatably connected inside the rotating groove.

[0008] Furthermore, a pin is inserted into the interior of the rotating groove, the pin passes through the lifting rod, and the lifting rod is rotatably connected to the hook body through the pin.

[0009] Furthermore, one end of the pin is located on one side of the hook body, and the other end of the pin extends to the other side of the hook body and is threaded with a nut.

[0010] Furthermore, a pressure sleeve is movably connected to the hook body, and the pressure sleeve covers the outside of the flexible airbag.

[0011] Furthermore, a sealing membrane is provided on the outer wall of the slide rod, and the slide rod is sealed to the inner wall of the slide groove through the sealing membrane.

[0012] Furthermore, a return spring is installed on the inner wall of the slide groove, and the other end of the return spring is connected to the slide rod. Under the initial elastic force, the return spring has a tendency to pull the slide rod to move into the slide groove.

[0013] Beneficial effects:

[0014] 1. This utility model adopts a dual anti-detachment mechanism that combines the rotating sealing of the lifting rod with the locking of the sliding rod and slot. Compared with the traditional spring plate structure, it greatly improves the reliability of anti-detachment and effectively avoids accidental detachment of heavy objects during hoisting.

[0015] 2. The linkage design of the flexible airbag, air guide hole and slide bar in this utility model can automatically enhance the anti-slip effect according to the load of the hook, automatically strengthen the locking when carrying heavy objects, and automatically reset when there is no load, with a high degree of intelligence. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the left-side structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the right-side structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0020] In the diagram: 1. Hook body; 2. Rotating groove; 3. Lifting rod; 4. Lifting hole; 5. Pin; 6. Nut; 7. Flexible airbag; 8. Pressure sleeve; 9. Slide groove; 10. Slide rod; 11. Slot; 12. Return spring; 13. Air guide hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4As shown, a crane hook anti-detachment device includes a hook body 1, a boom 3 rotatably connected to the hook body 1, the boom 3 rotating on the hook body 1 to open / close the opening of the hook body 1, a groove 9 is provided inside the hook body 1, a slide rod 10 is slidably installed inside the groove 9, a slot 11 for inserting the slide rod 10 is provided inside the boom 3, a flexible airbag 7 is installed on the inner arc surface of the hook body 1, and an air guide hole 13 is provided on the hook body 1 to connect the inner cavity of the flexible airbag 7 and the inner cavity of the groove 9.

[0023] Specifically, when it is necessary to lift heavy objects, the slings are hooked into the hook body 1. At this time, the boom 3 rotates around the rotating connection with the hook body 1, blocking the opening of the hook body 1 and preventing the slings from slipping out. If the sling exerts pressure on the flexible airbag 7 on the inner arc surface of the hook body 1, the gas enters the slide groove 9 through the air guide hole 13, pushing the slide rod 10 to slide within the slide groove 9. The slide rod 10 inserts into the slot 11 of the lifting rod 3, further fixing the position of the lifting rod 3 and enhancing the anti-detachment effect. When the sling is removed, the pressure on the flexible airbag 7 disappears, and the slide rod 10 exits from the slot 11 under the action of other reset structures such as the reset spring in the following claims. The lifting rod 3 can be rotated to open the opening of the hook body 1. The dual anti-detachment mechanism, which seals the opening by rotating the lifting rod 3 and locks the slide rod 10 and the slot 11, significantly improves the reliability of anti-detachment compared to the traditional spring plate structure. The linkage design of the flexible airbag 7, the air guide hole 13 and the slide rod 10 can automatically enhance the anti-detachment effect according to the load of the hook, and avoids the problems of spring fatigue failure and rusting and jamming in harsh environments. It adapts to complex working environments and ensures lifting safety.

[0024] As a technical optimization of this utility model, one end of the lifting rod 3 is fastened to the hook body 1, and the other end of the lifting rod 3 is provided with a lifting hole 4.

[0025] One end of the boom 3 is fastened to the hook body 1 to close the opening of the hook body 1, and the lifting hole 4 at the other end is used to connect the lifting rope of the crane to realize the connection between the hook and the crane, thereby completing the lifting operation. The functional division of the boom 3 is clearly defined. The setting of the lifting hole 4 enables the boom 3 to be stably connected to the crane, ensuring the structural stability of the entire hook during the lifting process, and facilitating the crane to lift the hook body 1 and the heavy object through the boom 3.

[0026] As a technical optimization of this utility model, a rotating groove 2 is provided at one end of the hook body 1, and the lifting rod 3 is rotatably connected inside the rotating groove 2.

[0027] Specifically, the rotating groove 2 at one end of the hook body 1 provides rotation space for the boom 3. The boom 3 is installed inside the rotating groove 2 and can rotate around the axis of the rotating groove 2 to realize the opening and closing action of the opening of the hook body 1. The design of the rotating groove 2 regulates the rotation path of the boom 3, ensuring the stability and accuracy of the rotation of the boom 3, so that the boom 3 can reliably open and close the opening of the hook body 1 and enhance the performance of the anti-detachment device.

[0028] As a technical optimization of this utility model, a pin 5 is inserted into the inside of the rotating groove 2, the pin 5 passes through the lifting rod 3, and the lifting rod 3 is rotatably connected to the hook body 1 through the pin 5.

[0029] Specifically, the pin 5 passes through the lifting rod 3 in the rotating groove 2, rotatably connecting the lifting rod 3 and the hook body 1 together, so that the lifting rod 3 can rotate in the rotating groove 2 with the pin 5 as the axis, realizing the opening and closing action. As a rotating connecting component, the pin 5 has a simple structure and a stable connection, ensuring the reliability of the rotating connection between the lifting rod 3 and the hook body 1, facilitating installation and maintenance, and ensuring the stability of the lifting rod 3 during rotation.

[0030] As a technical optimization of this utility model, one end of the pin 5 is located on one side of the hook body 1, and the other end of the pin 5 extends to the other side of the hook body 1 and is threadedly connected to a nut 6.

[0031] Specifically, one end of the pin 5 is located on one side of the hook body 1, and the other end extends to the other side of the hook body 1 and is connected to the nut 6 by a thread. After the nut 6 is tightened, the pin 5 can be fixed on the hook body 1 to prevent the pin 5 from loosening or falling off, and to ensure the stability of the rotational connection between the lifting rod 3 and the hook body 1. The threaded connection between the nut 6 and the pin 5 is easy to disassemble and install, and convenient for maintenance and repair of the anti-detachment device. At the same time, it can effectively prevent the pin 5 from shifting during use, ensure the reliability of the rotational connection of the lifting rod 3, and ensure the normal operation of the hook.

[0032] As a technical optimization of this utility model, a pressure sleeve 8 is movably connected to the hook body 1, and the pressure sleeve 8 covers the outside of the flexible airbag 7.

[0033] Specifically, the pressure sleeve 8 is movably connected to the hook body 1 and covers the outside of the flexible airbag 7. When the sling applies pressure to the flexible airbag 7, the pressure sleeve 8 can protect and limit the flexible airbag 7, and at the same time help to evenly transmit the pressure to the flexible airbag 7, so that it can play a better role. The setting of the pressure sleeve 8 protects the flexible airbag 7, prevents it from being damaged by external forces during use, and extends the service life of the flexible airbag 7; and can also help the flexible airbag 7 work more stably, improving the overall reliability and stability of the anti-detachment device.

[0034] As a technical optimization of this utility model, a sealing membrane is provided on the outer wall of the slide rod 10, and the slide rod 10 is sealed with the inner wall of the slide groove 9 through the sealing membrane.

[0035] Specifically, the sealing membrane on the outer wall of the slide rod 10 forms a seal between it and the inner wall of the slide groove 9. When gas enters the slide groove 9 through the air guide hole 13 and pushes the slide rod 10 to slide, it prevents gas leakage and ensures that the gas pressure can effectively push the slide rod 10 so that it can be smoothly inserted into the slot 11 of the hanging rod 3. The sealing membrane ensures the sealing and effectiveness of the gas transmission system, avoids the slide rod 10 from failing to move normally due to gas leakage, ensures the reliable operation of the dual anti-detachment mechanism of the anti-detachment device, and improves the stability and reliability of the anti-detachment device during operation.

[0036] As a technical optimization of this utility model, a return spring 12 is installed on the inner wall of the slide groove 9. The other end of the return spring 12 is connected to the slide rod 10. Under the initial elastic force, the return spring 12 has the tendency to pull the slide rod 10 to move into the slide groove 9.

[0037] Specifically, the return spring 12 installed on the inner wall of the slide 9 has a tendency to pull the slide rod 10 into the slide 9 under the initial elastic force. When the sling is removed and the pressure of the flexible airbag 7 disappears, the return spring 12 pulls the slide rod 10 out of the slot 11 of the boom 3, preparing for the opening of the boom 3 in the next lifting operation. The return spring 12 provides an automatic reset function for the slide rod 10, which can return the slide rod 10 to the initial position without manual intervention, simplifying the operation process and improving work efficiency; at the same time, it ensures the continuity and reliability of the anti-derailment device, ensuring that the anti-derailment device can play a normal role in each lifting operation.

[0038] Working principle: When hoisting heavy objects, the sling is first hooked into the hook body 1. Then, the boom 3 rotates around the pin 5 in the rotating groove 2 of the hook body 1, thereby sealing the opening of the hook body 1 and initially preventing the sling from slipping out. When the sling is hooked into and pressure is applied to the flexible airbag 7 on the inner arc surface of the hook body 1, the flexible airbag 7 is compressed, and the internal gas enters the slide groove 9 through the air guide hole 13. The gas pressure pushes the slide rod 10 to slide in the slide groove 9, and the slide rod 10 inserts into the slot 11 of the boom 3, further fixing the position of the boom 3 and achieving double anti-slip locking.

[0039] After the hoisting is completed, the slings are removed, and the pressure on the flexible airbag 7 disappears. At this time, the return spring 12 on the inner wall of the slide groove 9, with its initial elastic force, pulls the slide rod 10 into the slide groove 9, causing the slide rod 10 to exit from the slot 11. In this way, the boom 3 can rotate freely, opening the hook body 1 for the next hoisting operation. Throughout the process, the pressure sleeve 8 protects the flexible airbag 7 and assists in pressure transmission, the sealing film on the outer wall of the slide rod 10 ensures the sealing of the gas transmission system, and the nut 6 and pin 5 ensure the stability of the boom 3's rotational connection.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A crane hook anti-derailment device, comprising a hook body (1), characterized in that: A boom (3) is rotatably connected to the hook body (1). The boom (3) rotates on the hook body (1) to open / close the opening of the hook body (1). A groove (9) is provided inside the hook body (1). A slide rod (10) is slidably installed inside the groove (9). A slot (11) for inserting the slide rod (10) is provided inside the boom (3). A flexible airbag (7) is installed on the inner arc surface of the hook body (1). An air guide hole (13) is provided on the hook body (1) to connect the inner cavity of the flexible airbag (7) and the inner cavity of the groove (9).

2. The crane hook anti-derailment device as described in claim 1, characterized in that: One end of the boom (3) is fastened to the hook body (1), and the other end of the boom (3) is provided with a lifting hole (4).

3. The crane hook anti-derailment device as described in claim 1, characterized in that: One end of the hook (1) is provided with a rotating groove (2), and the rod (3) is rotatably connected inside the rotating groove (2).

4. The crane hook anti-derailment device as described in claim 3, characterized in that: A pin (5) is inserted inside the rotating groove (2), the pin (5) passes through the lifting rod (3), and the lifting rod (3) is rotatably connected to the hook body (1) through the pin (5).

5. The crane hook anti-derailment device as described in claim 4, characterized in that: One end of the pin (5) is located on one side of the hook body (1), and the other end of the pin (5) extends to the other side of the hook body (1) and is threaded with a nut (6).

6. The crane hook anti-derailment device as described in claim 1, characterized in that: A pressure sleeve (8) is movably connected to the hook body (1), and the pressure sleeve (8) covers the outside of the flexible airbag (7).

7. The crane hook anti-derailment device as described in claim 1, characterized in that: The outer wall of the slide rod (10) is provided with a sealing membrane, and the slide rod (10) is sealed with the inner wall of the slide groove (9) through the sealing membrane.

8. The crane hook anti-derailment device as described in claim 1, characterized in that: A return spring (12) is installed on the inner wall of the groove (9). The other end of the return spring (12) is connected to the slide rod (10). Under the initial elastic force, the return spring (12) tends to pull the slide rod (10) to move into the groove (9).

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